EP2971747B1 - High-pressure pump, in particular plug-in pump, for a fuel system for an internal combustion engine - Google Patents

High-pressure pump, in particular plug-in pump, for a fuel system for an internal combustion engine Download PDF

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Publication number
EP2971747B1
EP2971747B1 EP14701157.1A EP14701157A EP2971747B1 EP 2971747 B1 EP2971747 B1 EP 2971747B1 EP 14701157 A EP14701157 A EP 14701157A EP 2971747 B1 EP2971747 B1 EP 2971747B1
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EP
European Patent Office
Prior art keywords
flange
pressure pump
housing
flange parts
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14701157.1A
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German (de)
French (fr)
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EP2971747A1 (en
Inventor
Siamend Flo
Stefan PFUHL
Tamim Latif
Peter ANDRETZKY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication date
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Publication of EP2971747A1 publication Critical patent/EP2971747A1/en
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Publication of EP2971747B1 publication Critical patent/EP2971747B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/025—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by a single piston
    • F02M59/027—Unit-pumps, i.e. single piston and cylinder pump-units, e.g. for cooperating with a camshaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws

Definitions

  • the invention relates to a high-pressure pump according to the preamble of claim 1, and a flange according to the independent claims.
  • the problem underlying the invention is solved by a high-pressure pump according to claim 1.
  • Advantageous developments are specified in subclaims.
  • the invention has the advantage that a flange on a housing of a high-pressure fuel pump ("high-pressure pump") by means of caulking form fit or non-positively by means of press-fitting instead of each cohesively.
  • a welded connection between the flange and the housing is not required.
  • the elimination of welding eliminates the introduction of thermal energy and a resulting structural change in a material of the welding partners. As a result, unwanted deformations of the flange or of the housing as a result of microstructural changes are simultaneously reduced.
  • a sequence of assembly steps in the manufacture of the high-pressure pump can be made more flexible, which can result in manufacturing simplifications and cost savings.
  • inventive caulking or press-fitting of flange on the housing of the high pressure pump a dirt entry is avoided, as is possible, for example, in a welding operation as a result of welding spatter and smoke.
  • the flange can be made inexpensively and with relatively little mass of another material instead of stainless steel.
  • the at least two-part flange according to the invention with respect to a one-piece design has the advantage that in the production of the flange parts by means of punching a comparatively low material waste can be achieved.
  • each of the flange parts has only one, for example, a semicircular recess.
  • an optimal arrangement of a flange contour on a strip of material during punching is possible.
  • no additional connecting elements for the arrangement of the flange on the housing of the high pressure pump are required.
  • Such fasteners would be pins, for example.
  • a required positioning accuracy between the flange and the housing of the high-pressure pump is comparatively low, since no holes for pressing in said pins must be aligned. Likewise, additional holes can be omitted on the housing for pressing in the pins.
  • One Another advantage is that the flange can be applied before caulking with the housing with clearance, which may be tolerances compensated component tolerances.
  • the invention relates to a high-pressure pump, in particular plug-in pump, for a fuel system for an internal combustion engine, wherein the high-pressure pump comprises a housing and a flange arranged rigidly on the housing.
  • the flange has at least two parts, the high-pressure pump having a groove-like receiving region ("groove"), in which a radially inward region of the flange parts is accommodated.
  • the flange parts are held on the housing by a caulking connection and / or a press connection.
  • a welded joint for the arrangement of the flange on the housing is unnecessary, which eliminates the specific disadvantages.
  • the flange parts have recesses which are arranged on the flange parts in such a way that the recesses of the flange parts are partially covered by the groove in their installed position, wherein a material of the housing is caulked in the recesses. This creates space for the material changes made by the caulking in a simple and cost-effective way.
  • the recesses are designed as circular holes. Circular holes can be produced in a particularly simple and cost-effective manner during the course of a stamping process, as a result of which the production of the high-pressure pump can be made cheaper.
  • the radially inward regions of the flange parts have sections which have a greater material thickness and / or a different type of embossing than regions lying laterally thereof.
  • the flange parts are pressed into the groove.
  • the press-fit forces can be greatly reduced, since the contact surface between the flange on the one hand and the housing on the other hand reduced or even minimized and also the flange parts in the region of said sections are much more elastic.
  • the housing of the high-pressure pump is generally designed for sufficient corrosion protection for contact with ethanol-containing fuel made of stainless steel. Because a connection between the flange and the housing according to the invention does not require a welded connection, therefore, the flange can be advantageously made of a different material to the housing.
  • the housing and the flange are made of different stainless steels.
  • a cheaper stainless steel can be used for the flange, whereby material costs can be reduced accordingly. It is not absolutely necessary that the stainless steel has the property of weldability.
  • the flange is provided that it is made of aluminum or an aluminum compound or steel.
  • the stainless steel for the material of the flange part are described, whereby the production of the high pressure pump can be simplified and costs can be reduced. This is possible in particular because the flange is not connected to the housing by means of a welded connection.
  • the flange part is produced by stamping and / or embossing.
  • Previously known embodiments of flanges are generally made in one piece and therefore have at their center a circular hole which serves to connect the flange to the housing of the high-pressure pump.
  • each flange part has only one example semi-circular recess on.
  • FIGS. 1A and 1B show a designed as a plug-pump high-pressure pump 10 for a fuel system for a (not shown) internal combustion engine in a first and second view.
  • a "lower" side of the high pressure pump 10 which in a mounted state of the high pressure pump 10 of a mounting structure 12 (see FIG. 1B ) facing the internal combustion engine.
  • the high-pressure pump 10 has a housing 14 and in the present case two identical flange parts 16a and 16b.
  • the two flange portions 16a and 16b together form a rigidly arranged on the housing 14 flange 16 of the high-pressure pump 10.
  • the high pressure pump 10 has a groove-like receiving area 18 ("groove") (see FIG. 1B ).
  • Groove groove-like receiving area 18
  • the flange portions 16a and 16b each have two recesses 20, which are designed here as circular holes.
  • the recesses 20 are arranged on the flange parts 16a and 16b such that the recesses 20 of the flange parts 16a and 16b are partially covered by the groove in their installation position. In this case, a material of the housing 14 is caulked in the recesses 20 ("clamping connection").
  • the flange parts 16a and 16b of Figures 1A and 1B are similar to each other, and that mirror-symmetrical to one in the Figures 1A and 1B not shown vertical center line.
  • the flange parts 16a and 16b are produced here by means of stamping and embossing.
  • An in the Figures 1A and 1B Left and right areas, the flange portions 16a and 16b on edge portions 22 which are lifted by means of a stamping operation of other areas of the flange 16a and 16b, and thus allow a three-dimensional geometry of the flange 16a and 16b.
  • the flange portions 16a and 16b are stiffened by the edge portions 22, resulting in greater strength.
  • each of the flange parts 16a and 16b has a circular attachment hole 24.
  • the fastening holes 24 By means of the fastening holes 24, the flange parts 16a and 16b, and thus the high-pressure pump 10, can be screwed to the mounting structure 12.
  • the fastening holes 24 By means of the fastening holes 24, the flange parts 16a and 16b, and thus the high-pressure pump 10, can be screwed to the mounting structure 12.
  • screws are in the Figure 1A and the FIG. 1B but not shown.
  • FIG. 1B shows the arrangement of the high-pressure pump 10 after the Figure 1A in a partial sectional view tilted by 90 °.
  • the groove-like receiving region 18 is arranged radially circumferentially on a radially outer region of the housing 14.
  • the housing 14 of the high-pressure pump 10 is shown only in a region of the flange parts 16a and 16b.
  • the embodiment of the high-pressure pump 10 corresponds to the Figures 1A and 1B
  • conventional embodiments of high-pressure fuel pumps which are designed as piston pumps, in particular as plug-in pumps.
  • An assembly of the flange parts 16a and 16b on the housing 14 takes place for example by means of the following steps: In a first step, the two flange parts 16a and 16b are applied to the groove-like receiving area 18 in a defined position. In a second step, a material of the housing 14 is caulked by Kreisverstemmitch in the space provided for recesses 20. Preferably, at least two recesses 20 per flange 16a and 16b used to prevent a radial displacement and / or a tangential rotation of the flange portions 16a and 16b relative to the housing 14. In this case, the recesses 20 only a partial overlap with the groove-like receiving area 18.
  • the groove-like receiving portion 18 can be made with a comparatively small radial depth, whereby a required for the production of the housing 14 machining is facilitated.
  • the Figures 1A and 1B describe a substantially positive connection between the housing 14 and the flange 16a and 16b.
  • FIGS. 2A and 2B show one to the Figures 1A and 1B Alternative embodiment of the flange parts 16a and 16b and the high-pressure pump 10.
  • the flange part 16b is shown in a perspective view.
  • the flange portion 16b has in a radially inward region present three sections 26, which have a greater material thickness or a different type of embossing as lying laterally of their areas.
  • the two flange parts 16a and 16b are also in the FIGS. 2A and 2B similarly executed.
  • the two flange portions 16a and 16b in the radially encircling groove-like receiving portion 18 is pressed ("press connection"). Accordingly, in each case at least three radially inward areas, by means of which the flange parts 16a and 16b are held on the housing 14.
  • a welded connection for fastening the flange parts 16a and 16b to the housing 14 is in the FIGS. 2A and 2B and also in the Figures 1A and 1B not mandatory.
  • sections 26, deviating from the example of FIGS. 2A and 2B in almost any number, arrangement and shape can be arranged on the flange 16a and 16b.
  • elements comparable to the sections 26 in a region of the groove-like receiving region 18 of the housing 14 instead of the flange parts 16a and 16b. This is in the FIGS. 2A and 2B but not shown.
  • the housing 14 of the high-pressure pump 10 is made of a comparatively high-grade stainless steel, which makes it possible for the high-pressure pump 10 to be operated without corrosion with an ethanol-containing fuel.
  • the two flange parts 16a and 16b are made of a different and relatively inexpensive stainless steel.
  • the flange 16a and 16b are also produced by punching and / or embossing.
  • the assembly of the flange 16a and 16b on the housing 14 is carried out for the embodiment of the high pressure pump 10 after the FIGS. 2A and 2B by pressing in, in particular with the participation of the above-described Sections 26.
  • For this required pressing forces are comparatively low, because a sum of contact surfaces (pressing zones) between the flange 16a and 16b and the sections 26 and the housing 14 of the high pressure pump 10 is also relatively small.
  • the flange parts 16a and 16b are structurally relatively elastic in the region of the sections 26. By such a reduction of the press-fit forces, elaborate post-processing, for example by means of grinding, may possibly be dispensable.
  • the FIGS. 2A and 2B describe a substantially frictional connection between the housing 14 and the flange portions 16a and 16b, respectively.
  • FIG. 3 shows a section of a schematically illustrated material strip 28 for the production of flange parts 16a and 16b arranged therein finished stamped and stamped flange parts 16a and 16b. From the material strip 28 flange portions 16a and 16b can be continuously produced by punching and embossing. In the present case, two flange parts 16a and 16b are shown completely.
  • the flange parts 16a and 16b are arranged continuously on the material strip 28, the arrangement being particularly optimal.
  • the edge portions 22 of a respective flange portion 16a and 16b can be arranged comparatively closely adjacent to a semicircular recess 30 of a flange portion 16b or 16a disposed adjacent to the material band 28.
  • a particularly small material waste is made possible, whereby manufacturing costs of the flange parts 16a and 16b and the high-pressure pump 10 can be reduced.

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Hochdruckpumpe nach dem Oberbegriff des Anspruchs 1, sowie ein Flanschteil nach den nebengeordneten Patentansprüchen.The invention relates to a high-pressure pump according to the preamble of claim 1, and a flange according to the independent claims.

Vom Markt her bekannt sind Kraftstoffsysteme für Brennkraftmaschinen, welche u.a. eine Kraftstoff-Hochdruckpumpe aufweisen, beispielsweise für eine Benzindirekteinspritzung (BDE). Damit kann eine jeweils benötigte Kraftstoffmenge in einen Kraftstoffspeicher bzw. Kraftstoffverteiler unter einem jeweils gewünschten Druck gefördert werden. Beispielsweise sind solche Kraftstoff-Hochdruckpumpen als Steckpumpen ausgeführt. Dabei wird ein Gehäuse der Kraftstoff-Hochdruckpumpe über einen Flansch ("Pumpenflansch") mit einem Zylinderkopf der Brennkraftmaschine verschraubt. Konstruktionsbedingt ist die Verbindung zwischen Flansch und Gehäuse starken mechanischen Belastungen als Folge von Druckkräften, Vibrationen und Schraubenklemmkräften ausgesetzt.From the market known fuel systems for internal combustion engines, which u.a. Have a high-pressure fuel pump, for example, for a gasoline direct injection (BDE). Thus, a respective required amount of fuel can be conveyed into a fuel tank or fuel distributor under a particular desired pressure. For example, such high-pressure fuel pumps are designed as plug-in pumps. In this case, a housing of the high-pressure fuel pump via a flange ("pump flange") is screwed to a cylinder head of the internal combustion engine. Due to the design, the connection between flange and housing is exposed to strong mechanical loads as a result of compressive forces, vibrations and screw clamping forces.

In der WO 2012/109180 A1 ist eine Hochdruckpumpe offenbart.In the WO 2012/109180 A1 is a high-pressure pump disclosed.

Offenbarung der ErfindungDisclosure of the invention

Das der Erfindung zugrunde liegende Problem wird durch eine Hochdruckpumpe nach Anspruch 1 gelöst. Vorteilhafte Weiterbildungen sind in Unteransprüchen angegeben. Für die Erfindung wichtige Merkmale finden sich ferner in der nachfolgenden Beschreibung und in den Zeichnungen. Die Erfindung weist den Vorteil auf, dass ein Flansch an einem Gehäuse einer Kraftstoff-Hochdruckpumpe ("Hochdruckpumpe") mittels Verstemmen formschlüssig bzw. mittels Einpressen kraftschlüssig statt jeweils stoffschlüssig angeordnet werden kann. Eine Schweißverbindung zwischen dem Flansch und dem Gehäuse ist nicht erforderlich. Durch den Wegfall des Schweißens entfallen ein Einbringen von thermischer Energie und eine daraus resultierende Gefügeänderung in einem Werkstoff der Schweißpartner. Dadurch reduzieren sich zugleich ungewollte Verformungen des Flansches bzw. des Gehäuses in Folge der Gefügeänderungen. Zudem kann eine Reihenfolge von Montageschritten bei der Herstellung der Hochdruckpumpe flexibler gestaltet werden, wodurch sich Vereinfachungen in der Herstellung sowie Kosteneinsparungen ergeben können. Weiterhin wird durch das erfindungsgemäße Verstemmen bzw. Einpressen von Flanschteilen an dem Gehäuse der Hochdruckpumpe ein Schmutzeintrag vermieden, wie dies beispielsweise bei einem Schweißvorgang in Folge von Schweißspritzern und Schmauch möglich ist. Außerdem kann, ebenfalls wegen des Entfalls der Schweißverbindung, der Flansch kostengünstig und mit vergleichsweise geringer Masse aus einem anderen Werkstoff statt aus Edelstahl hergestellt werden.The problem underlying the invention is solved by a high-pressure pump according to claim 1. Advantageous developments are specified in subclaims. For the invention important features can be further found in the following description and in the drawings. The invention has the advantage that a flange on a housing of a high-pressure fuel pump ("high-pressure pump") by means of caulking form fit or non-positively by means of press-fitting instead of each cohesively. A welded connection between the flange and the housing is not required. The elimination of welding eliminates the introduction of thermal energy and a resulting structural change in a material of the welding partners. As a result, unwanted deformations of the flange or of the housing as a result of microstructural changes are simultaneously reduced. In addition, a sequence of assembly steps in the manufacture of the high-pressure pump can be made more flexible, which can result in manufacturing simplifications and cost savings. Furthermore, by the inventive caulking or press-fitting of flange on the housing of the high pressure pump a dirt entry is avoided, as is possible, for example, in a welding operation as a result of welding spatter and smoke. In addition, also because of the elimination of the welded joint, the flange can be made inexpensively and with relatively little mass of another material instead of stainless steel.

Weiterhin hat der erfindungsgemäße mindestens zweiteilige Flansch in Bezug auf eine einteilige Ausführung den Vorteil, dass bei der Herstellung der Flanschteile mittels Stanzen ein vergleichsweise geringer Materialverschnitt erreichbar ist. Dies ist deshalb möglich, weil bei dem erfindungsgemäßen mindestens zweiteiligen Flansch jedes der Flanschteile lediglich eine zum Beispiel halbkreisförmige Aussparung aufweist. Dadurch ist eine optimale Anordnung einer Flanschkontur auf einem Materialband beim Stanzen möglich. Weiterhin sind keine zusätzlichen Verbindungselemente zur Anordnung der Flanschteile an dem Gehäuse der Hochdruckpumpe erforderlich. Solche Verbindungselemente wären beispielsweise Stifte. Entsprechend ist eine erforderliche Positioniergenauigkeit zwischen den Flanschteilen und dem Gehäuse der Hochdruckpumpe vergleichsweise gering, da keine Bohrungen zum Einpressen der besagten Stifte zueinander fluchten müssen. Ebenso können zusätzliche Bohrungen am Gehäuse zum Einpressen der Stifte entfallen. Ein weiterer Vorteil besteht darin, dass die Flanschteile vor dem Verstemmen mit dem Gehäuse mit Spiel angelegt werden können, wodurch gegebenenfalls Bauteiletoleranzen ausgleichbar sind.Furthermore, the at least two-part flange according to the invention with respect to a one-piece design has the advantage that in the production of the flange parts by means of punching a comparatively low material waste can be achieved. This is possible because in the at least two-part flange according to the invention, each of the flange parts has only one, for example, a semicircular recess. As a result, an optimal arrangement of a flange contour on a strip of material during punching is possible. Furthermore, no additional connecting elements for the arrangement of the flange on the housing of the high pressure pump are required. Such fasteners would be pins, for example. Accordingly, a required positioning accuracy between the flange and the housing of the high-pressure pump is comparatively low, since no holes for pressing in said pins must be aligned. Likewise, additional holes can be omitted on the housing for pressing in the pins. One Another advantage is that the flange can be applied before caulking with the housing with clearance, which may be tolerances compensated component tolerances.

Die Erfindung betrifft eine Hochdruckpumpe, insbesondere Steckpumpe, für ein Kraftstoffsystem für eine Brennkraftmaschine, wobei die Hochdruckpumpe ein Gehäuse und einen starr an dem Gehäuse angeordneten Flansch umfasst. Erfindungsgemäß ist der Flansch mindestens zweiteilig ausgeführt, wobei die Hochdruckpumpe einen nutartigen Aufnahmebereich ("Nut") aufweist, in welchem ein radial einwärtiger Bereich der Flanschteile aufgenommen ist. Dabei sind die Flanschteile an dem Gehäuse durch eine Stemmverbindung und/oder eine Pressverbindung gehalten. Insbesondere ist eine Schweißverbindung zur Anordnung der Flanschteile an dem Gehäuse entbehrlich, wodurch die dafür spezifischen Nachteile entfallen.The invention relates to a high-pressure pump, in particular plug-in pump, for a fuel system for an internal combustion engine, wherein the high-pressure pump comprises a housing and a flange arranged rigidly on the housing. According to the invention, the flange has at least two parts, the high-pressure pump having a groove-like receiving region ("groove"), in which a radially inward region of the flange parts is accommodated. In this case, the flange parts are held on the housing by a caulking connection and / or a press connection. In particular, a welded joint for the arrangement of the flange on the housing is unnecessary, which eliminates the specific disadvantages.

In einer Ausgestaltung der Hochdruckpumpe weisen die Flanschteile Aussparungen auf, welche derart an den Flanschteilen angeordnet sind, dass die Aussparungen der Flanschteile in deren Einbaulage teilweise von der Nut überdeckt sind, wobei ein Material des Gehäuses in den Aussparungen verstemmt ist. Dadurch wird auf eine einfache und zugleich kostengünstige Weise Platz für die durch das Verstemmen erfolgten Materialveränderungen geschaffen.In one embodiment of the high-pressure pump, the flange parts have recesses which are arranged on the flange parts in such a way that the recesses of the flange parts are partially covered by the groove in their installed position, wherein a material of the housing is caulked in the recesses. This creates space for the material changes made by the caulking in a simple and cost-effective way.

Dabei kann vorgesehen sein, dass die Aussparungen als kreisförmige Löcher ausgeführt sind. Kreisförmige Löcher können besonders einfach und kostengünstig im Verlauf eines Stanzprozesses hergestellt werden, wodurch die Herstellung der Hochdruckpumpe verbilligt werden kann.It can be provided that the recesses are designed as circular holes. Circular holes can be produced in a particularly simple and cost-effective manner during the course of a stamping process, as a result of which the production of the high-pressure pump can be made cheaper.

In einer weiteren Ausgestaltung der Hochdruckpumpe weisen die radial einwärtigen Bereiche der Flanschteile Abschnitte auf, welche eine größere Materialstärke und/oder eine andersartige Prägung als von ihnen seitlich liegende Bereiche aufweisen. Mittels dieser Abschnitte sind die Flanschteile in die Nut eingepresst. Durch diese Abschnitte können die Einpresskräfte stark reduziert werden, da die Kontaktfläche zwischen den Flanschteilen einerseits und dem Gehäuse andererseits reduziert oder sogar minimiert wird und zudem die Flanschteile im Bereich der besagten Abschnitte wesentlich elastischer sind.In a further embodiment of the high-pressure pump, the radially inward regions of the flange parts have sections which have a greater material thickness and / or a different type of embossing than regions lying laterally thereof. By means of these sections, the flange parts are pressed into the groove. Through these sections, the press-fit forces can be greatly reduced, since the contact surface between the flange on the one hand and the housing on the other hand reduced or even minimized and also the flange parts in the region of said sections are much more elastic.

Somit kann auf ein kostenintensives Feinbearbeiten, wie beispielsweise Schleifen, verzichtet werden. Form, Lage und Anzahl der Abschnitte ist situativ wählbar.Thus, a costly finishing, such as grinding, can be dispensed with. Shape, position and number of sections can be selected depending on the situation.

Das Gehäuse der Hochdruckpumpe ist im Allgemeinen wegen eines ausreichenden Korrosionsschutzes für einen Kontakt mit ethanolhaltigem Kraftstoff aus Edelstahl ausgeführt. Weil eine Verbindung zwischen dem Flansch und dem Gehäuse erfindungsgemäß ohne eine Schweißverbindung auskommt, kann daher der Flansch vorteilhaft aus einem zu dem Gehäuse unterschiedlichen Material hergestellt sein.The housing of the high-pressure pump is generally designed for sufficient corrosion protection for contact with ethanol-containing fuel made of stainless steel. Because a connection between the flange and the housing according to the invention does not require a welded connection, therefore, the flange can be advantageously made of a different material to the housing.

Beispielsweise kann vorgesehen sein, dass das Gehäuse und der Flansch aus unterschiedlichen Edelstählen hergestellt sind. Insbesondere kann für das Flanschteil ein kostengünstigerer Edelstahl verwendet werden, wodurch Materialkosten entsprechend gesenkt werden können. Dabei ist es nicht zwingend erforderlich, dass der Edelstahl die Eigenschaft der Verschweißbarkeit aufweist.For example, it can be provided that the housing and the flange are made of different stainless steels. In particular, a cheaper stainless steel can be used for the flange, whereby material costs can be reduced accordingly. It is not absolutely necessary that the stainless steel has the property of weldability.

In einer Ausgestaltung des Flanschteils ist vorgesehen, dass es aus Aluminium oder aus einer Aluminiumverbindung oder aus Stahl hergestellt ist. Dadurch werden Alternativen zum Edelstahl für das Material des Flanschteils beschrieben, wodurch die Herstellung der Hochdruckpumpe vereinfacht und Kosten gesenkt werden können. Dies ist insbesondere deshalb möglich, weil der Flansch nicht mittels einer Schweißverbindung mit dem Gehäuse verbunden ist.In one embodiment of the flange is provided that it is made of aluminum or an aluminum compound or steel. As a result, alternatives to the stainless steel for the material of the flange part are described, whereby the production of the high pressure pump can be simplified and costs can be reduced. This is possible in particular because the flange is not connected to the housing by means of a welded connection.

Weiterhin kann vorgesehen sein, dass das Flanschteil durch Stanzen und/oder Prägen hergestellt ist. Vorbekannte Ausführungsformen von Flanschen sind im Allgemeinen einteilig ausgeführt und weisen daher in ihrer Mitte ein kreisförmiges Loch auf, welches zur Verbindung des Flansches mit dem Gehäuse der Hochdruckpumpe dient. Bei der erfindungsgemäßen mindestens zweiteiligen Ausführung des Flansches weist jedes Flanschteil nur eine beispielsweise halbkreisförmige Aussparung auf. Dadurch können die Flanschteile auf dem Materialband für den Stanzprozess besonders günstig angeordnet werden, wodurch sich ein geringerer Materialverschnitt ergibt. Dies ermöglicht entsprechende Kosteneinsparungen.Furthermore, it can be provided that the flange part is produced by stamping and / or embossing. Previously known embodiments of flanges are generally made in one piece and therefore have at their center a circular hole which serves to connect the flange to the housing of the high-pressure pump. In the at least two-part embodiment of the flange according to the invention, each flange part has only one example semi-circular recess on. As a result, the flange on the material band for the punching process can be arranged particularly low, resulting in a lower material waste. This allows corresponding cost savings.

Nachfolgend werden beispielhafte Ausführungsformen der Erfindung unter Bezugnahme auf die Zeichnung erläutert. In der Zeichnung zeigen:

Figur 1A
eine erste Ausführungsform einer Hochdruckpumpe in einer Ansicht von unten;
Figur 1B
die erste Ausführungsform der Hochdruckpumpe von Figur 1A in einer geschnittenen Seitenansicht;
Figur 2A
ein Flanschteil für eine zweite Ausführungsform der Hochdruckpumpe in einer perspektivischen Darstellung;
Figur 2B
die zweite Ausführungsform der Hochdruckpumpe mit Flanschteilen entsprechend der Figur 2A in einer geschnittenen Seitenansicht; und
Figur 3
eine schematische Draufsicht auf ein Materialband zur Herstellung von Flanschteilen mit darin angeordneten fertigen Flanschteilen.
Hereinafter, exemplary embodiments of the invention will be explained with reference to the drawings. In the drawing show:
Figure 1A
a first embodiment of a high-pressure pump in a view from below;
FIG. 1B
the first embodiment of the high pressure pump of Figure 1A in a sectional side view;
FIG. 2A
a flange for a second embodiment of the high-pressure pump in a perspective view;
FIG. 2B
the second embodiment of the high-pressure pump with flange according to the FIG. 2A in a sectional side view; and
FIG. 3
a schematic plan view of a strip of material for the production of flange with arranged therein finished flange.

Es werden für funktionsäquivalente Elemente und Größen in allen Figuren auch bei unterschiedlichen Ausführungsformen die gleichen Bezugszeichen verwendet.The same reference numerals are used for functionally equivalent elements and sizes in all figures, even in different embodiments.

Die Figuren 1A und 1B zeigen eine als Steckpumpe ausgeführte Hochdruckpumpe 10 für ein Kraftstoffsystem für eine (nicht dargestellte) Brennkraftmaschine in einer ersten und zweiten Ansicht. Dargestellt ist in Figur 1A eine "untere" Seite der Hochdruckpumpe 10, welche in einem montierten Zustand der Hochdruckpumpe 10 einer Anbaustruktur 12 (siehe Figur 1B) der Brennkraftmaschine zugewandt ist. Die Hochdruckpumpe 10 weist ein Gehäuse 14 und vorliegend zwei gleichartige Flanschteile 16a und 16b auf.The Figures 1A and 1B show a designed as a plug-pump high-pressure pump 10 for a fuel system for a (not shown) internal combustion engine in a first and second view. Is shown in Figure 1A a "lower" side of the high pressure pump 10, which in a mounted state of the high pressure pump 10 of a mounting structure 12 (see FIG. 1B ) facing the internal combustion engine. The high-pressure pump 10 has a housing 14 and in the present case two identical flange parts 16a and 16b.

Die beiden Flanschteile 16a und 16b bilden zusammen einen starr an dem Gehäuse 14 angeordneten Flansch 16 der Hochdruckpumpe 10. Dazu weist die Hochdruckpumpe 10 einen nutartigen Aufnahmebereich 18 ("Nut") auf (siehe Figur 1B). In dem nutartigen Aufnahmebereich 18 ist ein jeweiliger radial einwärtiger Bereich der Flanschteile 16a bzw. 16b aufgenommen. Die Flanschteile 16a und 16b weisen jeweils zwei Aussparungen 20 auf, welche vorliegend als kreisförmige Löcher ausgeführt sind. Die Aussparungen 20 sind derart an den Flanschteilen 16a und 16b angeordnet, dass die Aussparungen 20 der Flanschteile 16a und 16b in deren Einbaulage teilweise von der Nut überdeckt sind. Dabei ist ein Material des Gehäuses 14 in den Aussparungen 20 verstemmt ("Stemmverbindung").The two flange portions 16a and 16b together form a rigidly arranged on the housing 14 flange 16 of the high-pressure pump 10. For this purpose, the high pressure pump 10 has a groove-like receiving area 18 ("groove") (see FIG. 1B ). In the groove-like receiving region 18, a respective radially inward region of the flange parts 16a and 16b is accommodated. The flange portions 16a and 16b each have two recesses 20, which are designed here as circular holes. The recesses 20 are arranged on the flange parts 16a and 16b such that the recesses 20 of the flange parts 16a and 16b are partially covered by the groove in their installation position. In this case, a material of the housing 14 is caulked in the recesses 20 ("clamping connection").

Die Flanschteile 16a und 16b der Figuren 1A und 1B sind zueinander gleichartig ausgeführt, und zwar spiegelsymmetrisch zu einer in den Figuren 1A und 1B nicht dargestellten vertikalen Mittellinie. Die Flanschteile 16a und 16b sind vorliegend mittels Stanzen und Prägen hergestellt. An in den Figuren 1A und 1B linken bzw. rechten Bereichen weisen die Flanschteile 16a und 16b Randabschnitte 22 auf, welche mittels eines Prägevorgangs von übrigen Bereichen der Flanschteile 16a und 16b abgehoben sind, und somit eine dreidimensionale Geometrie der Flanschteile 16a und 16b ermöglichen. Insbesondere werden die Flanschteile 16a und 16b durch die Randabschnitte 22 versteift, wodurch sich eine größere Festigkeit ergibt. Vorliegend weist jeder der Flanschteile 16a und 16b ein kreisrundes Befestigungsloch 24 auf. Mittels der Befestigungslöcher 24 können die Flanschteile 16a und 16b, und damit die Hochdruckpumpe 10, an der Anbaustruktur 12 angeschraubt werden. Dazu erforderliche Schrauben sind in der Figur 1A und der Figur 1B jedoch nicht mit dargestellt.The flange parts 16a and 16b of Figures 1A and 1B are similar to each other, and that mirror-symmetrical to one in the Figures 1A and 1B not shown vertical center line. The flange parts 16a and 16b are produced here by means of stamping and embossing. An in the Figures 1A and 1B Left and right areas, the flange portions 16a and 16b on edge portions 22 which are lifted by means of a stamping operation of other areas of the flange 16a and 16b, and thus allow a three-dimensional geometry of the flange 16a and 16b. In particular, the flange portions 16a and 16b are stiffened by the edge portions 22, resulting in greater strength. In the present case, each of the flange parts 16a and 16b has a circular attachment hole 24. By means of the fastening holes 24, the flange parts 16a and 16b, and thus the high-pressure pump 10, can be screwed to the mounting structure 12. For this required screws are in the Figure 1A and the FIG. 1B but not shown.

Die Figur 1B zeigt die Anordnung der Hochdruckpumpe 10 nach der Figur 1A in einer dazu um 90°gekippten teilweisen Schnittansicht. Insbesondere sind in der Figur 1B die Anbaustruktur 12, sowie der nutartige Aufnahmebereich 18 zu erkennen. Der nutartige Aufnahmebereich 18 ist radial umlaufend an einem radial äußeren Bereich des Gehäuses 14 angeordnet.The FIG. 1B shows the arrangement of the high-pressure pump 10 after the Figure 1A in a partial sectional view tilted by 90 °. In particular, in the FIG. 1B the attachment structure 12, as well as the groove-like receiving area 18 to recognize. The groove-like receiving region 18 is arranged radially circumferentially on a radially outer region of the housing 14.

Man erkennt, wie der radial einwärtige Bereich der Flanschteile 16a und 16b in dem nutartigen Aufnahmebereich 18 aufgenommen ist. Dadurch, dass Materialabschnitte des Gehäuses 14, welche den nutartigen Aufnahmebereich 18 in einem Bereich der Aussparungen 20 umschließen, in die Aussparungen 20 verstemmt werden, kann der Flansch 16 bzw. die beiden Flanschteile 16a und 16b mit dem nutartigen Aufnahmebereich 18 bzw. mit dem Gehäuse 14 starr verbunden werden. Es versteht sich, dass die Aussparungen 20, abweichend von dem Beispiel der Figuren 1A und 1B, in nahezu beliebiger Anzahl, Anordnung und Form an den Flanschteilen 16a bzw. 16b angeordnet sein können.It can be seen how the radially inward region of the flange parts 16a and 16b is received in the groove-like receiving region 18. The fact that material portions of the housing 14, which enclose the groove-like receiving region 18 in a region of the recesses 20, are caulked into the recesses 20, the flange 16 and the two flange 16a and 16b with the groove-like receiving portion 18 and with the housing 14 are rigidly connected. It is understood that the recesses 20, different from the example of Figures 1A and 1B , in almost any number, arrangement and shape can be arranged on the flange 16a and 16b.

In der Figur 1B ist das Gehäuse 14 der Hochdruckpumpe 10 nur in einem Bereich der Flanschteile 16a und 16b dargestellt. Im Übrigen entspricht die Ausführungsform der Hochdruckpumpe 10 nach den Figuren 1A und 1B jedoch üblichen Ausführungsformen von Kraftstoff-Hochdruckpumpen, welche als Kolbenpumpen, insbesondere als Steckpumpen, ausgeführt sind.In the FIG. 1B For example, the housing 14 of the high-pressure pump 10 is shown only in a region of the flange parts 16a and 16b. Incidentally, the embodiment of the high-pressure pump 10 corresponds to the Figures 1A and 1B However, conventional embodiments of high-pressure fuel pumps, which are designed as piston pumps, in particular as plug-in pumps.

Eine Montage der Flanschteile 16a und 16b an dem Gehäuse 14 erfolgt beispielsweise mittels der folgenden Schritte: In einem ersten Schritt werden die beiden Flanschteile 16a und 16b an dem nutartigen Aufnahmebereich 18 in einer definierten Position angelegt. In einem zweiten Schritt wird ein Material des Gehäuses 14 mittels Kreisverstemmungen in die dafür vorgesehenen Aussparungen 20 verstemmt. Vorzugsweise werden mindestens zwei Aussparungen 20 je Flanschteil 16a bzw. 16b verwendet, um eine radiale Verschiebung und/oder eine tangentiale Verdrehung der Flanschteile 16a bzw. 16b relativ zu dem Gehäuse 14 zu verhindern. Dabei weisen die Aussparungen 20 nur eine partielle Überdeckung mit dem nutartigen Aufnahmebereich 18 auf. Dadurch kann der nutartige Aufnahmebereich 18 mit einer vergleichsweise geringen radialen Tiefe ausgeführt werden, wodurch eine zur Herstellung des Gehäuses 14 erforderliche spanende Bearbeitung erleichtert wird. Die Figuren 1A und 1B beschreiben eine im Wesentlichen formschlüssige Verbindung zwischen dem Gehäuse 14 und den Flanschteilen 16a bzw. 16b.An assembly of the flange parts 16a and 16b on the housing 14 takes place for example by means of the following steps: In a first step, the two flange parts 16a and 16b are applied to the groove-like receiving area 18 in a defined position. In a second step, a material of the housing 14 is caulked by Kreisverstemmungen in the space provided for recesses 20. Preferably, at least two recesses 20 per flange 16a and 16b used to prevent a radial displacement and / or a tangential rotation of the flange portions 16a and 16b relative to the housing 14. In this case, the recesses 20 only a partial overlap with the groove-like receiving area 18. Thereby, the groove-like receiving portion 18 can be made with a comparatively small radial depth, whereby a required for the production of the housing 14 machining is facilitated. The Figures 1A and 1B describe a substantially positive connection between the housing 14 and the flange 16a and 16b.

Die Figuren 2A und 2B zeigen eine zu den Figuren 1A und 1B alternative Ausführungsform der Flanschteile 16a und 16b bzw. der Hochdruckpumpe 10. In der Figur 2A ist das Flanschteil 16b in einer perspektivischen Ansicht dargestellt.The FIGS. 2A and 2B show one to the Figures 1A and 1B Alternative embodiment of the flange parts 16a and 16b and the high-pressure pump 10. In the FIG. 2A the flange part 16b is shown in a perspective view.

Das Flanschteil 16b weist in einem radial einwärtigen Bereich vorliegend drei Abschnitte 26 auf, welche eine größere Materialstärke bzw. eine andersartige Prägung als von ihnen seitlich liegende Bereiche aufweisen. Die beiden Flanschteile 16a und 16b sind auch in den Figuren 2A und 2B gleichartig ausgeführt.The flange portion 16b has in a radially inward region present three sections 26, which have a greater material thickness or a different type of embossing as lying laterally of their areas. The two flange parts 16a and 16b are also in the FIGS. 2A and 2B similarly executed.

Mittels der Abschnitte 26 sind die beiden Flanschteile 16a und 16b in dem radial umlaufenden nutartigen Aufnahmebereich 18 eingepresst ("Pressverbindung"). Entsprechend ergeben sich jeweils mindestens drei radial einwärtige Bereiche, mittels welchen die Flanschteile 16a und 16b an dem Gehäuse 14 gehalten sind. Eine Schweißverbindung zur Befestigung der Flanschteile 16a und 16b an dem Gehäuse 14 ist in den Figuren 2A und 2B und ebenso in den Figuren 1A und 1B nicht erforderlich.By means of the sections 26, the two flange portions 16a and 16b in the radially encircling groove-like receiving portion 18 is pressed ("press connection"). Accordingly, in each case at least three radially inward areas, by means of which the flange parts 16a and 16b are held on the housing 14. A welded connection for fastening the flange parts 16a and 16b to the housing 14 is in the FIGS. 2A and 2B and also in the Figures 1A and 1B not mandatory.

Es versteht sich, dass die Abschnitte 26, abweichend von dem Beispiel der Figuren 2A und 2B, in nahezu beliebiger Anzahl, Anordnung und Form an den Flanschteilen 16a bzw. 16b angeordnet sein können. Darüber hinaus ist es denkbar, zu den Abschnitten 26 vergleichbare Elemente in einem Bereich des nutartigen Aufnahmebereichs 18 des Gehäuses 14 statt an den Flanschteilen 16a und 16b anzuordnen. Dies ist in den Figuren 2A und 2B jedoch nicht dargestellt.It is understood that the sections 26, deviating from the example of FIGS. 2A and 2B , in almost any number, arrangement and shape can be arranged on the flange 16a and 16b. Moreover, it is conceivable to arrange elements comparable to the sections 26 in a region of the groove-like receiving region 18 of the housing 14 instead of the flange parts 16a and 16b. This is in the FIGS. 2A and 2B but not shown.

Vorliegend ist das Gehäuse 14 der Hochdruckpumpe 10 aus einem vergleichsweise hochwertigen Edelstahl hergestellt, welcher es ermöglicht, dass die Hochdruckpumpe 10 ohne Korrosion mit einem ethanolhaltigen Kraftstoff betrieben werden kann. Im Unterschied dazu sind die beiden Flanschteile 16a und 16b aus einem unterschiedlichen und vergleichsweise kostengünstigen Edelstahl hergestellt. Alternativ ist es möglich, die Flanschteile 16a und 16b auch aus Aluminium oder aus einer Aluminiumverbindung oder auch aus Stahl herzustellen. Ebenso wie in den Figuren 1A und 1B sind auch die Flanschteile 16a und 16b gemäß den Figuren 2A und 2B durch Stanzen und/oder Prägen hergestellt.In the present case, the housing 14 of the high-pressure pump 10 is made of a comparatively high-grade stainless steel, which makes it possible for the high-pressure pump 10 to be operated without corrosion with an ethanol-containing fuel. In contrast, the two flange parts 16a and 16b are made of a different and relatively inexpensive stainless steel. Alternatively, it is possible to manufacture the flange parts 16a and 16b also from aluminum or from an aluminum connection or also from steel. Just like in the Figures 1A and 1B are also the flange 16a and 16b according to the FIGS. 2A and 2B produced by punching and / or embossing.

Die Montage der Flanschteile 16a und 16b an dem Gehäuse 14 erfolgt für die Ausführungsform der Hochdruckpumpe 10 nach den Figuren 2A und 2B mittels Einpressen, und zwar insbesondere unter Beteiligung der oben beschriebenen Abschnitte 26. Dazu erforderliche Einpresskräfte sind vergleichsweise gering, weil eine Summe von Kontaktflächen (Presszonen) zwischen den Flanschteilen 16a und 16b bzw. den Abschnitten 26 und dem Gehäuse 14 der Hochdruckpumpe 10 ebenfalls vergleichsweise klein ist. Zudem sind die Flanschteile 16a und 16b konstruktionsbedingt im Bereich der Abschnitte 26 vergleichsweise elastisch. Durch eine derartige Reduzierung der Einpresskräfte kann eine aufwändige Nachbearbeitung, beispielsweise mittels Schleifen gegebenenfalls entbehrlich sein. Die Figuren 2A und 2B beschreiben eine im Wesentlichen kraftschlüssige Verbindung zwischen dem Gehäuse 14 und den Flanschteilen 16a bzw. 16b.The assembly of the flange 16a and 16b on the housing 14 is carried out for the embodiment of the high pressure pump 10 after the FIGS. 2A and 2B by pressing in, in particular with the participation of the above-described Sections 26. For this required pressing forces are comparatively low, because a sum of contact surfaces (pressing zones) between the flange 16a and 16b and the sections 26 and the housing 14 of the high pressure pump 10 is also relatively small. In addition, the flange parts 16a and 16b are structurally relatively elastic in the region of the sections 26. By such a reduction of the press-fit forces, elaborate post-processing, for example by means of grinding, may possibly be dispensable. The FIGS. 2A and 2B describe a substantially frictional connection between the housing 14 and the flange portions 16a and 16b, respectively.

Die Figur 3 zeigt einen Ausschnitt aus einem schematisch dargestellten Materialband 28 zur Herstellung von Flanschteilen 16a und 16b mit darin angeordneten fertig gestanzten und geprägten Flanschteilen 16a bzw. 16b. Aus dem Materialband 28 können Flanschteile 16a und 16b fortlaufend durch Stanzen und Prägen hergestellt werden. Vorliegend sind zwei Flanschteile 16a und 16b vollständig dargestellt.The FIG. 3 shows a section of a schematically illustrated material strip 28 for the production of flange parts 16a and 16b arranged therein finished stamped and stamped flange parts 16a and 16b. From the material strip 28 flange portions 16a and 16b can be continuously produced by punching and embossing. In the present case, two flange parts 16a and 16b are shown completely.

Man erkennt, dass die Flanschteile 16a und 16b fortlaufend auf dem Materialband 28 angeordnet sind, wobei die Anordnung besonders optimal ist. Insbesondere können die Randabschnitte 22 eines jeweiligen Flanschteiles 16a bzw. 16b vergleichsweise eng benachbart zu einer halbkreisförmigen Aussparung 30 eines benachbart auf dem Materialband 28 angeordneten Flanschteiles 16b bzw. 16a angeordnet werden. Dadurch wird ein besonders geringer Materialverschnitt ermöglicht, wodurch Herstellkosten der Flanschteile 16a und 16b bzw. der Hochdruckpumpe 10 gesenkt werden können.It can be seen that the flange parts 16a and 16b are arranged continuously on the material strip 28, the arrangement being particularly optimal. In particular, the edge portions 22 of a respective flange portion 16a and 16b can be arranged comparatively closely adjacent to a semicircular recess 30 of a flange portion 16b or 16a disposed adjacent to the material band 28. As a result, a particularly small material waste is made possible, whereby manufacturing costs of the flange parts 16a and 16b and the high-pressure pump 10 can be reduced.

Claims (7)

  1. High-pressure pump (10), in particular unit injection pump, for a fuel system for an internal combustion engine, wherein the high-pressure pump (10) comprises a housing (14) and a flange (16) arranged on the housing (14), wherein the flange (16) is of at least two-part design, and wherein the high-pressure pump (10) has a groove-like seating area (18), in which a radially inward area of the flange parts (16a, 16b) is seated, and characterized in that the flange parts (16a, 16b) are rigidly held on the housing (14) by a calked connection and/or a press-fit connection.
  2. High-pressure pump (10) according to Claim 1, characterized in that the flange parts (16a, 16b) have cutouts (20), which are arranged on the flange parts (16a, 16b) in such a way that in their fitted position the cutouts (20) of the flange parts (16a, 16b) are partially covered by the groove (18), and that a material of the housing (14) is calked in the cutouts (20).
  3. High-pressure pump (10) according to Claim 2, characterized in that the cutouts (20) are designed as circular holes.
  4. High-pressure pump (10) according to Claim 1, characterized in that the radially inward areas of the flange parts (16a, 16b) comprise portions (26) which have a greater material thickness and/or a stamped relief different from the areas situated to the side of them, and the portions (26) serve for pressing the flange parts (16a, 16b) into the groove (18).
  5. High-pressure pump (10) according to one of the preceding claims, characterized in that the housing (14) and the flange (16) are produced from different high-grade steels.
  6. High pressure pump according to one of the preceding claims, characterized in that at least one of the flange parts (16a, 16b) is produced from aluminum or from an aluminum alloy or from steel.
  7. High pressure pump according to one of the preceding claims, characterized in that at least one of the flange parts (16a, 16b) is produced by punching and/or stamping.
EP14701157.1A 2013-03-15 2014-01-14 High-pressure pump, in particular plug-in pump, for a fuel system for an internal combustion engine Active EP2971747B1 (en)

Applications Claiming Priority (2)

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DE102013204549.2A DE102013204549A1 (en) 2013-03-15 2013-03-15 High-pressure pump, in particular plug-in pump, for a fuel system for an internal combustion engine
PCT/EP2014/050527 WO2014139697A1 (en) 2013-03-15 2014-01-14 High-pressure pump, in particular plug-in pump, for a fuel system for an internal combustion engine

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EP2971747B1 true EP2971747B1 (en) 2017-07-05

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US (1) US20160032879A1 (en)
EP (1) EP2971747B1 (en)
JP (2) JP2016509161A (en)
KR (1) KR20150123260A (en)
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DE (1) DE102013204549A1 (en)
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Also Published As

Publication number Publication date
JP6516801B2 (en) 2019-05-22
WO2014139697A1 (en) 2014-09-18
CN105143661A (en) 2015-12-09
US20160032879A1 (en) 2016-02-04
ES2643312T3 (en) 2017-11-22
EP2971747A1 (en) 2016-01-20
KR20150123260A (en) 2015-11-03
DE102013204549A1 (en) 2014-09-18
JP2016509161A (en) 2016-03-24
JP2017223233A (en) 2017-12-21

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